The Ebyte E280-2G4T12S 2.4GHz LoRa Wireless Module is an industrial-grade UART serial transceiver based on Semtech's SX1280 RF chip, delivering 12dBm (18mW) transmit power, -132dBm RX sensitivity, and up to 3km line-of-sight range under Open Area Tests, supporting LoRa, FLRC, and GFSK modulations, transparent transmission, and real-time wireless ranging with 2m accuracy for smart cities, drone positioning, and battery-powered IoT applications.
| Spec Category | Parameter Dimension | E280-2G4T12S |
| Hardware Core | RF Chip | Semtech SX1280 |
| Interface Type | UART Serial Port (TTL level, 3.3V compatible, 5V carries burn risk) | |
| Physical Dimensions | 17.5 mm × 28.7 mm (1.27 mm pitch SMD package) | |
| Product Weight | 2.3g +- 0.1g | |
| RF Performance | Frequency Band | 2.4 GHz ISM Band (2400 MHz – 2500 MHz) |
| Modulation Tech | LoRa, FLRC, GFSK | |
| Maximum TX Power | 12 dBm (18 mW) | |
| RX Sensitivity | -130 dBm to -134 dBm (at 1 kbps air rate) | |
| Max LOS Range | 3000 m (Clear line-of-sight, 5dBi antenna, 2.5m height, 1kbps) | |
| Wireless Air Rate | 1 kbps – 2 Mbps (User-programmable control) | |
| Antenna Interface | Dual options: Onboard PCB Antenna / IPEX-1 Connector (50 Ω impedance) | |
| Electrical Specs | Operating Voltage | 2.3 V – 5.5 V DC (Values 5.0 V guarantee maximum output power) |
| TX Current | 46 mA (Instantaneous peak current during transmission) | |
| RX Current | 20 mA | |
| Sleep Current | 8 (Software shutdown mode) | |
| Operating Specs | Temperature Range | Industrial design: -40°C to +85°C |
| Key Features | Hardware wireless ranging (2m accuracy), RSSI, data encryption/compression |
| Main Parameters | Description | Remark |
|---|---|---|
| Reference distance | 3000m | Clear and open environment,antenna gain 5dBi,antenna height 2.5 meters,air rate 1kbps |
| Launch length | 121 Btye 221 Btye |
Normal mode,using 1Mbps airspeed Continuous transmission mode |
| Interface method | 1.27mm | - |
| Modulation | GFSK LoRa FLRC |
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| Communication Interface | UART Serial port | TTL Level |
| Encapsulation method | SMD | - |
| Dimensions | 17.5*28.7mm | - |
| Antenna interface | IPEX/PCB | Equivalent impedance is about 50Ω |
| Main Parameters | Min | Type | Max | Unit | Remark |
|---|---|---|---|---|---|
| Working voltage | 2.3 | 5 | 5.5 | V | ≥5.0V can guarantee output power |
| Communication level | - | 3.3 | - | V | Using 5V TTL is risky to burn |
| Working temperature | -40 | - | +85 | ℃ | ndustrial design |
| Working frequency | 2400 | - | 2500 | MHz | Support ISM frequency band |
| Emission current | - | 46 | - | mA | Instantaneous power consumption |
| Receiving current | - | 20 | - | mA | - |
| Sleep current | - | 8 | - | μA | Software shutdown |
| Maximum transmit power | 11.5 | 12 | 13.5 | dBm | - |
| Receiving sensitivity | -130 | -132 | -134 | dBm | Air rate is 1kbps |
| Air rate | 1k | 1k | 2M | bps | User programming control |
Practical Application Scenarios
Scenario 1: Agricultural Drone Positioning & Ranging Systems
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Regional Industry Pain Points: Agricultural spraying drones operating in rural North America and Europe require precise altitude and distance measurements relative to ground docking stations to prevent collisions and ensure uniform crop coverage. Traditional GPS/GNSS can lose accuracy under heavy foliage, and ultrasonic ranging sensors are vulnerable to dust and wind interference.
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Ebyte Technical Solution: The E280-2G4T12S utilizes its hardware-integrated time-of-flight (ToF) wireless ranging engine to calculate distances with $\pm$2m accuracy. By pairing one module on the drone and another on the ground station, operators achieve continuous, real-time height and distance monitoring over a 3km range, independent of satellite visibility or environmental dirt.
Scenario 2: Warehouse AGV Fleet Tracking & Low-Latency Coordination
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Regional Industry Pain Points: Automated Guided Vehicles (AGVs) in smart logistics warehouses require ultra-low-latency data exchanges to coordinate movements and prevent collisions. Traditional Sub-GHz modules lack the bandwidth to transmit high-speed data, whereas standard Wi-Fi experiences high congestion and packet drops when hundreds of AGVs run simultaneously.
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Ebyte Technical Solution: Operating in the 2.4GHz ISM band with FLRC and GFSK modulations, this module supports high-speed air rates up to 2Mbps and continuous UART transmission up to 460,800 bps without packet limitations. The high-speed wireless rates coupled with LoRa anti-interference capabilities allow warehouse AGV fleets to broadcast telemetry, coordinate paths, and receive emergency stop commands instantly, even in highly crowded industrial environments.
Scenario 3: Smart Utility Sub-Station Monitoring & Perimeter Security
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Regional Industry Pain Points: Industrial substations require continuous monitoring of distributed temperature and vibration sensors. High-voltage lines generate extreme electromagnetic interference (EMI) that disrupts typical commercial-grade 2.4GHz wireless links, leading to constant signal dropouts and battery drain due to repeated retransmission cycles.
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Ebyte Technical Solution: By leveraging LoRa modulation in the 2.4GHz spectrum, the E280-2G4T12S provides a processing gain that allows signals to be decoded even when the signal-to-noise ratio is negative. Coupled with its robust industrial-grade $-40^\circ\text{C}$ to $+85^\circ\text{C}$ operation and low sleep current of 8$\mu$A, it ensures that battery-powered sensor nodes deployed near high-EMI transformers can sleep for long periods and transmit sensor data reliably back to a central gateway.
FAQ Section
Q1: What makes 2.4GHz LoRa on the SX1280 chip different from standard Sub-GHz LoRa modules?
A1: The primary difference lies in the balance between data rate and global regulatory compliance. Traditional Sub-GHz LoRa (like 868MHz in Europe or 915MHz in North America) has excellent penetration but low data rates and distinct regional frequency restrictions. The 2.4GHz LoRa technology inside the E280-2G4T12S operates on a globally unified ISM band, bypassing regional radio regulatory hurdles. Additionally, it supports high-speed air rates up to 2Mbps (via FLRC/GFSK modes) and built-in wireless ranging functionality, which standard Sub-GHz modules do not offer.
Q2: How does the built-in wireless ranging function work, and what is its precision?
A2: The E280-2G4T12S takes advantage of the Semtech SX1280's integrated hardware engine to perform time-of-flight (ToF) distance measurements. By measuring the round-trip propagation time of the RF signal between a master and slave device, it calculates the distance directly. The module achieves a ranging accuracy of $\pm$2 meters under line-of-sight test conditions, making it an excellent, low-power alternative to radar or GPS for local coordinates and distance alarms.
Q3: Can the module’s serial interface connect directly to a 5V MCU?
A3: While the module operates over a wide power supply voltage of 2.3V to 5.5V DC, its serial communication interface (UART) runs at a 3.3V TTL level. Connecting the RX/TX pins directly to a 5V MCU carries a high risk of burning the internal chip's digital pins. When interfacing with a 5V system, you must use a bidirectional logic level shifter or simple resistor divider networks on the RX line to ensure input voltages do not exceed 3.3V.
Q4: How do I switch between the onboard PCB antenna and the external IPEX connector?
A4: The module is designed with dual antenna options to suit different enclosure needs. The choice between the onboard PCB microstrip antenna and the IPEX-1 generation RF port is determined by physical hardware routing. The module comes factory-configured for one of these paths; if you need to switch the output in your design, it requires changing the position of a tiny 0-ohm RF jumper resistor near the antenna feed point to direct the 50-ohm impedance match to your preferred port.
